Which tests measure thyroid hormone levels to assess thyroid function?

• A. Troponin
• B. T4/TSH
• C. UA
• D. Mono Spot

Answer: (B)

Thyroid function is best assessed by looking at the hormones that regulate metabolism and the pituitary signal that tells the thyroid what to do. TSH mirrors the pituitary’s response to circulating thyroid hormones, while T4 reflects how much thyroid hormone the thyroid is actually producing. Measuring both provides a clear picture: if TSH is high and T4 is low, it points to hypothyroidism; if TSH is low and T4 is high, it points to hyperthyroidism. This combined testing directly evaluates thyroid hormone status and the feedback loop that controls it.

Other tests listed don’t evaluate thyroid hormones. Troponin indicates heart muscle injury, not thyroid function. UA (urinalysis) checks kidney function, infection, and other urinary issues. Mono Spot detects Epstein-Barr virus infection.